/**
 * Copyright (C) 2006-2012 phloc systems
 * http://www.phloc.com
 * office[at]phloc[dot]com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.phloc.procurement.invoice;

import javax.annotation.Nullable;

import com.phloc.procurement.domain.IProcObject;

/**
 * Read-only interface for a single invoice attachment
 * 
 * @author philip
 */
public interface IProcInvoiceAttachment extends IProcObject
{
  /**
   * @return The owner of this attachment.
   */
  @Nullable
  IProcInvoice getOwner ();

  /**
   * @return The manually assigned ID of this attachment. Don't mix up this ID
   *         with the ID retrieved by {@link #getID()} as one attachment can be
   *         referenced from several objects!
   * @see com.phloc.procurement.attachment.IProcAttachmentResolver
   */
  @Nullable
  String getAttachmentID ();
}
